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5(3+x)=5(4x-1)-85
We move all terms to the left:
5(3+x)-(5(4x-1)-85)=0
We add all the numbers together, and all the variables
5(x+3)-(5(4x-1)-85)=0
We multiply parentheses
5x-(5(4x-1)-85)+15=0
We calculate terms in parentheses: -(5(4x-1)-85), so:We get rid of parentheses
5(4x-1)-85
We multiply parentheses
20x-5-85
We add all the numbers together, and all the variables
20x-90
Back to the equation:
-(20x-90)
5x-20x+90+15=0
We add all the numbers together, and all the variables
-15x+105=0
We move all terms containing x to the left, all other terms to the right
-15x=-105
x=-105/-15
x=+7
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